Codeine
(INN) C18H21NO3
or methylmorphine is an opiate used for its analgesic, antitussive and
antidiarrheal properties. It is by far the most widely used opiate in the world
and very likely most commonly used drug overall according to numerous reports
over the years by organisations such as the World Health Organisation and its
League of Nations predecessor agency and others. It is one of the most effective
orally-administered opioid analgesics and has a wide safety margin... For
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